<form>
  <div class="form-group">
    <label for="exampleInputEmail1">商品名称：</label>
    <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp" placeholder="商品价格">
  </div>

  <div class="form-group">
    <label for="exampleInputPassword1">商品价格：</label>
    <input type="password" class="form-control" id="exampleInputPassword1" placeholder="商品名称">
  </div>

  <div class="form-group">
    <label for="exampleInputPassword1">商品类型：</label>
    <select class="custom-select mr-sm-2" id="exampleFormControlSelect1">
      <option>1</option>
      <option>2</option>
      <option>3</option>
      <option>4</option>
      <option>5</option>
    </select>
  </div>
  
  <button type="submit" class="btn  btn-block btn-primary">搜索</button>
</form>
